/**
* True if the partition exprs and ordering elements and the window of analyticExpr match ours.
*/
public boolean isCompatible(AnalyticExpr analyticExpr) {
if (requiresIndependentEval(analyticExprs.get(0)) || requiresIndependentEval(analyticExpr)) {
return false;
}
if (!Expr.equalSets(analyticExpr.getPartitionExprs(), partitionByExprs)) {
return false;
}
if (!analyticExpr.getOrderByElements().equals(orderByElements)) return false;
if ((window == null) != (analyticExpr.getWindow() == null)) return false;
if (window == null) return true;
return analyticExpr.getWindow().equals(window);
}
/**
* Return true if 'this' and other have compatible partition exprs and our orderByElements are a
* prefix of other's.
*/
public boolean isPrefixOf(SortGroup other) {
if (other.orderByElements.size() > orderByElements.size()) return false;
if (!Expr.equalSets(partitionByExprs, other.partitionByExprs)) return false;
for (int i = 0; i < other.orderByElements.size(); ++i) {
OrderByElement ob = orderByElements.get(i);
OrderByElement otherOb = other.orderByElements.get(i);
// TODO: compare equiv classes by comparing each equiv class's placeholder
// slotref
if (!ob.getExpr().equals(otherOb.getExpr())) return false;
if (ob.isAsc() != otherOb.isAsc()) return false;
if (ob.nullsFirst() != otherOb.nullsFirst()) return false;
}
return true;
}
/**
* True if the partition exprs of sortGroup are compatible with ours. For now that means
* equality.
*/
public boolean isCompatible(SortGroup sortGroup) {
return Expr.equalSets(sortGroup.partitionByExprs, partitionByExprs);
}
/** True if the partition and ordering exprs of windowGroup match ours. */
public boolean isCompatible(WindowGroup windowGroup) {
return Expr.equalSets(windowGroup.partitionByExprs, partitionByExprs)
&& windowGroup.orderByElements.equals(orderByElements);
}
